Aki was a young man with medium-length black hair that he usually wore in a topknot style .Aki generally appeared to be a very stoic man who acted mature and sometimes blunt to the point of rudeness.He had a tendency to get attached to others easily, and hated to see people get hurt, especially his close friendshttps. Aki Hayakawa was the deuteragonist of the Public Safety Saga. He was a Public Safety Devil Hunter working under Makimas squad. mean, rude, blunt,protective,short tempered, serious.